Nits and lice in secondary schools

My children are at secondary school and although I comb & check their hair regularly the nits keep coming back. It seems that secondary schools in East Sussex are not interested in informing parents when there is an outbreak. So we contacted various DOH departments who all claimed it was not under their remit and finally ended up having to right a letter to our MP. Schools need get this basic of child well being in hand and not hide behind child protection laws, just in case they offed someone